BRITISH ZOOPHYTES. 117 



8. S. AEGENTELLA, Penniiu/fon. Plate VIII. fig. 1. 



Hab. : Menai Straits. Attached to roots of Lami- 

 naria [A. S. P.). Height about | in. 



This species bears the same relationship to S. 

 argentea that 8. filicula does to 8. ahietwa. It is* 

 small and delicate in growth, not exceeding | in. in 

 height. 



The branches are closely set, alternate, and furcate. 

 The calycles are somewhat pointed in shape. There 

 are four of them to an internode, and one in the axis 

 between the branches. 



The reproductive organs were not on any of the 

 specimens obtained by me. 



Genus IV. Selaginopsis, AUman. 



Stem consisting of a single axile tube to which the 

 calycles are adnate, and on which they are disposed in 

 several longitudinal rows. — All. 



This genus was established by Prof. Allmau * for a 

 Japanese species which he called Selaijinopds fnsca. 

 The Rev. A. M. Norman (A. N. H., March, 1878) con- 

 siders the genus as characterized above to include the 

 S.fusca of Allman and the Sertularia fusca of John- 

 ston. The former of these he therefore calls 8. Allmani, 

 retaining '^fusca" for Dr. Johnston's species. 



S. FUSCA, Johnston. 



Sertularia nigi'a [Jameson, R. Q. C, G. J.), Dyna- 

 mena nigra (Flem.), J), noire {De B.), Sertularia fusca 

 (G.J., D. L., T.H.), Diphasia fusca (Jg.), Nigellastrum 

 fuscura {Gray). 



Hab. : On the north-east coast only. Rare. Height 

 3 in. The stem of this zoophyte is of a blackish-brown 

 * Linu. Soc. Joura.,xii. (1876), 272. 



